KR102091179B1 - Coating adhesion-enhanced ceramic coating solution - Google Patents

Abstract

The present invention relates to a nano-composite which comprises: ceramic nanoparticles having a vinyl group (-CH_2=CH_2); and a silicone polymer having a hydrosilane group (-SiH), and in which the ceramic nanoparticles and the silicon polymer are chemically bonded through hydrosilylation between the vinyl group (-CH_2=CH_2) and the hydrosilane group (-SiH), and to a coating adhesion-enhanced ceramic coating solution.

Description

{Coating adhesion-enhanced ceramic coating solution}

The present invention is a vinyl group (-CH ₂ = CH _2), but containing a silicone polymer having a ceramic nanoparticles and hydrosilane groups (-SiH), a vinyl group (-CH ₂ = CH ₂₎ group and a hydrosilane (-SiH) having The present invention relates to a nanocomposite characterized by chemically bonding ceramic nanoparticles and a silicone polymer through a hydrosilylation reaction between the liver and a ceramic coating solution having an increased coating adhesion.

Kitchen utensils such as frying pans and pots have been mainly manufactured using ordinary steel, aluminum alloy, aluminum sheet, stainless steel, etc. In particular, aluminum materials that are light, easy to mold and low in manufacturing cost are frequently used.

However, there are many problems such as repeated metal expansion and contraction due to rapid heating and rapid cooling, damage to the coated surface due to consumer negligence, oxidation, peeling, and corrosion. Particularly, due to the above problem, the metal component such as aluminum is exposed due to the coating being peeled off, and food is stretched to the area where the coating is peeled, and the base material is corroded due to the acid component of the cooked food. It has been reported to have side effects, such as Alzheimer's disease.

Therefore, the kitchen utensil should have a strong corrosion resistance and abrasion resistance against surface abrasion and scratches despite a high cooking temperature, and must have a non-stick property that does not stick to food.

Since the inorganic paint and inorganic ceramic coating composition used for the coating of ceramic materials have properties such as excellent heat resistance, weather resistance, fouling resistance, chemical resistance, and durability, in the cook-ware field, ceramics that are fine on the metal surface of the product Technology has been used to prevent metal corrosion of household kitchen utensils by applying a coating film.

Meanwhile, ceramics are traditionally made using natural raw materials such as clay, and have been used as a container (porcelain). Recently, it is a term that collectively refers to products that are heat-treated using high-purity artificial inorganic raw materials such as glass and metal oxides, and are called fine ceramics to distinguish them from ceramics.

Ceramic coating is a fine ceramic with a strong corrosion resistance, heat resistance, and abrasion resistance. The ceramic coating is applied to the surface of the product to prevent corrosion of metal and prevent food from sticking when cooking in home kitchen appliances.

Ceramic-coated kitchen containers are capable of realizing a variety of colors that are difficult to express with other coatings such as fluorine coatings, and coatings do not peel off or burn even at temperatures above 350 ° C, despite the many advantages of non-toxic, anti-bacterial, and far-infrared rays from natural minerals. And it is relatively delaminated (exfoliated) due to the short persistence of food non-stickiness (Nonstick, non-stick) and physical properties that are weak to impact, and is being ignored by consumers.

When cooking food, the technology of cookware, where peeling durability and non-stick function are the most important, is based on polytetrafluoroethylene (PTFE, Teflon) based fluorine coating method (EPA, officially announced in 2005) and gel casting (Gel-casting). ) Eco-friendly ceramic coating method is mainly used.

The thermal stability of the coating material for cooking utensils is an important performance index that can shorten the life of the cooking utensil due to the thermal decomposition of the coating material that may occur during heating cooking or prevent the thermally decomposed material from migrating to food. Polytetrafluoroethylene (PTFE) -based coatings represented by Teflon (Deflon, Dupont Co.) are most frequently used as non-stick coatings for cooking utensils, but are cooked using meat or oil heated to 230 ℃ to 260 ℃ because the thermal decomposition temperature is around 200 ℃. The environment emits toxic substances that are harmful to the human body.

The gel-casting method is the most economical method among various methods for forming fine ceramics. When mixed with ceramic powder, the organic additive in the ceramic mixed solution is maintained in a monomer state, exhibiting low viscosity, and It is a method of obtaining a high-viscosity molded body according to the shape of a mold by adding a reaction catalyst to form a polymer network having a network structure. At this time, the time to transition from the sol state to the gel state can be relatively easily controlled by the amount of monomer and cross-linker, the amount and type of the reaction catalyst, and the amount of distilled water.

However, the current ceramic coating method has excellent performance in all aspects, but as the number of times it is applied to a kitchen utensil increases, the non-stick persistence is short and peeling occurs relatively frequently due to its weak impact. There is this. Therefore, the non-stick performance and the function of preventing peeling are insufficient, and the fluorine coating product harmful to the human body occupies 80% of the domestic market. Non-stick performance is improved by introducing silicone with methyl group (-CH ₃ ) on the ceramic coating, but it is difficult to overcome (Friction Coefficient of Teflon: 0.05 to 0.1, Silicone: 0.3 to 0.8). There are no companies in the world that have commercialized fluorine coating-level non-stick and anti-peel ceramic coating methods, and there is a need for the development of nano-materials with silicone oil.

The present invention is to provide a composite ceramic coating agent having a fluorine coating level non-stick and peeling durability characteristics to enhance the functionality of the kitchenware.

In addition, the present invention is to provide a coating technology effective in preventing peeling by exhibiting excellent non-adhesive properties, and at the same time strengthening the fine structure inside the fragile fine ceramic, thereby enhancing impact durability.

The first aspect of the present invention contains a ceramic nanoparticle having a vinyl group (-CH ₂ = CH ₂ ) and a silicone polymer having a hydrosilane group (-SiH), but a vinyl group (-CH ₂ = CH ₂ ). It provides a nanocomposite characterized by the chemical bonding of ceramic nanoparticles and silicon polymer through hydrosilylation between-and hydrosilane groups (-SiH).

The second aspect of the present invention provides a ceramic coating liquid characterized by containing the nanocomposite of the first aspect.

The third aspect of the present invention is a ceramic nanoparticle having a vinyl group (-CH ₂ = CH ₂ ); a silicone polymer having a hydrosilane group (-SiH); And a catalyst for hydrosilylation between a vinyl group (-CH ₂ = CH ₂ ) and a hydrosilane group (-SiH).

In the fourth aspect of the present invention, a method of manufacturing an article in which part or all of a surface is coated with the nanocomposite of the first aspect comprises: ceramic nanoparticles having a vinyl group (-CH ₂ = CH ₂ ); a silicone polymer having a hydrosilane group (-SiH); And applying a coating solution having a catalyst for hydrosilylation between a vinyl group (-CH ₂ = CH ₂ ) and a hydrosilane group (-SiH); By heat treatment, (i) performing hydrosilylation between the ceramic nanoparticles having a vinyl group (-CH ₂ = CH ₂ ) and a silicone polymer having (-SiH) and (ii) crosslinking between the silicone polymers It provides a method of manufacturing a coated article characterized in that it comprises a step.

The fifth aspect of the present invention provides an article coated with a part or all of the surface with the nanocomposite of the first aspect.

Hereinafter, the present invention will be described in detail.

The nanocomposite according to the present invention contains a ceramic nanoparticle having a vinyl group (-CH ₂ = CH ₂ ) and a silicone polymer having a hydrosilane group (-SiH), but a vinyl group (-CH ₂ = CH ₂ ) It is characterized by the chemical bonding of ceramic nanoparticles and silicone polymers through hydrosilylation between-and hydrosilane groups (-SiH).

FIG. 1 (a) shows vinylated silica synthesized by a Sol-gel method, and FIG. 1 (b) shows a chemical bonding reaction between vinylated silica and poly (dimethoxysiloxane) (PDMS), a silicone polymer.

For example, ceramic nanoparticles having a vinyl group (-CH ₂ = CH ₂ ) may have a hydroxyl group on the surface of the silica nanoparticles replaced with a vinyl group (FIG. 3).

The coating solution of the present invention interferes with the crosslinking reaction of the silicone polymer (silicone) through the hydrosilylation reaction between the vinyl group (-CH ₂ = CH ₂ ) of the silica nanoparticles and the hydrosilane group (-SiH) of the silicone polymer chain, and the network chain density ( By lowering the network chain density), the adhesion of the surface of the coating layer increases. When applied to the coating of the kitchenware, the adhesion of the surface of the coating layer to the substrate is increased, thereby reducing peeling and surface abrasion of the coating layer that may occur in repeated use of the kitchen container.

A non-limiting example of a silicone polymer is polydimethylsiloxane (PDMS). Polydimethylsiloxane (PDMS) is basically a silicone polymer having hydrophobic properties, and can be stably coated on a relatively large area of a substrate, coated and adhered to an uneven surface, and has excellent transparency, durability and flexibility. There is this.

Silicone polymer (silicone) is a polymer consisting of a side chain in which silicon and oxygen form a siloxane bond (Si-O-Si) and a main chain in which an organic group is bonded to a silicon molecule, and has both organic and inorganic properties. The properties of the silicone polymer include low surface tension, nonionic and nonpolar, hydrophobic and water repellent, heat and oxidation stability, low temperature stability, gas permeability, chemical inertness, flame retardancy, environmental friendliness, and non-toxicity.

Silicone polymers are largely classified into three basic types according to their skeleton structure: oil, rubber, and resin.

Silicone oil usually has a chain-like molecular structure as shown in the following formula. Since each molecular chain is not chemically bound, it can move freely between each other and has fluidity.

[Equation 1]

Here, R: mainly methyl group (CH ₃ ), other phenyl group (C ₆ H ₅ ), long chain allyl group (C _n H _{2n -1} ), Trifluoropropyl (CF ₃ CH ₂ CH ₂ ), etc.

Naturally, the longer the molecule, the lower the fluidity, and as a result, the viscosity increases, but when R is methyl, i.e., the methyl silicone oil polymerization degree (number of Si) is 2 is 0.65 cSt at room temperature, and the polymerization degree is 2,000 to 500,000 cSt. do.

On the other hand, silicone rubber (elastomer) has a siloxane chain cross-linked to form a network structure. In addition, the number of mesh bonding points (crosslinking points) is usually a loose structure containing one for every hundred of R ₂ SiO. In this structure, unlike silicone oil, since the molecular chains are chemically bonded to each other, they cannot move, so fluidity is lost, but rather, the degree of freedom of the molecule is increased and elasticity occurs, indicating the properties of rubber. And as the crosslinking of the rubber progresses, the degree of freedom of the molecule decreases and the elasticity decreases, resulting in a stiffness.

The nanocomposite of the present invention includes (i) a hydrosilylation reaction between a ceramic nanoparticle having a vinyl group (-CH ₂ = CH ₂ ) and a silicone polymer having a hydrosilane group (-SiH) and (ii) silicone polymers. It may be formed through cross-linking of the liver, and at this time, it is preferable that it is cured with silicone rubber through cross-linking between silicone oils having fluid hydrosilane groups (-SiH).

At this time, the hydrosilylation reaction between the vinyl group (-CH ₂ = CH ₂ ) and the hydrosilane group (-SiH) can also change the phase structure of the silicon polymer matrix. In addition, in the nanocomposite of the present invention, for example, ceramic nanoparticles are dispersed in a silicone polymer matrix, but ceramic nanoparticles having a vinyl group (-CH ₂ = CH ₂ ) undergo hydrogensilylation with the silicone polymer chain. By achieving the chemical bond through, it is possible to suppress the cross-linking reaction and lower the network chain density, thereby increasing the surface adhesion.

The behavior of the change in adhesion strength according to the increase of the vinyl group was similar to that of pure PDMS at about 5 wt%, but it was confirmed that the adhesion strength improvement was over 300% at 10 wt% or more (Experimental Example 2). It can be seen that the tendency of the adhesive strength according to the content of the hydrosilane group is the same as the behavior of the vinyl group content change. As a result, the hydrosilane group and the vinyl group can have a direct influence on the lower adhesive strength. (Experimental Example 2)

Ceramic nanoparticles having a vinyl group (-CH ₂ = CH ₂ ) in the nanocomposite of the present invention may be contained in 0.1wt% to 20wt%, preferably 5wt% to 15wt%.

In addition, the present invention can provide a ceramic coating solution containing the nanocomposite of the present invention described above. At this time, a non-polar solvent such as n-pentane, n-hexane, xylene, toluene, or acetone may be used as a solvent, but crosslinking of the silicone polymer having hydrosilane (-SiH) in the nanocomposite does not occur or only partially occurs, resulting in fluidity. It can be present as silicone oil.

Method of manufacturing an article coated with a part or all of the surface of the nanocomposite of the present invention,

Ceramic nanoparticles having a vinyl group (-CH ₂ = CH ₂ ); a silicone polymer having a hydrosilane group (-SiH); And applying a coating solution having a catalyst for hydrosilylation between a vinyl group (-CH ₂ = CH ₂ ) and a hydrosilane group (-SiH);

By heat treatment, (i) hydrosilylation between a ceramic nanoparticle having a vinyl group (-CH ₂ = CH ₂ ) and a silicone polymer having a hydrosilane group (-SiH) and (ii) crosslinking between the silicone polymers And performing the steps.

Therefore, the present invention is a ceramic nanoparticle having a vinyl group (-CH ₂ = CH ₂ ); a silicone polymer having a hydrosilane group (-SiH); And a catalyst for hydrosilylation of a vinyl group (-CH ₂ = CH ₂ ) and a hydrosilane group (-SiH). The components may be contained in containers in each or various combinations.

In the method of manufacturing an article on which a part or all of the surface is coated with the nanocomposite of the present invention, the coating solution is preferably used by removing air bubbles.

The heat treatment temperature may be 25 ~ 150 ℃. It can be carried out by room temperature drying furnace or by thermal curing.

An article coated with a part or all of the surface of the nanocomposite of the present invention may provide a corrugated coating surface through the nanocomposite. The micro-wrinkle-coated surface of the nanocomposite of the present invention has a relatively large specific surface area and is soft, and the van der Waals force is improved, resulting in high surface adhesion.

The article to be coated may be a part or a kitchen appliance. The base material of kitchen utensils is aluminum, sus, magnesium, etc.

In particular, the nanocomposite of the present invention is suitable as a coating agent for heated cooking (frying pans, pans) kitchen containers. This is because the nanocomposite does not peel off and / or does not undergo thermal decomposition even at temperatures above 350 ° C. The temperature at which the silicone oil having the lowest thermal stability among the coating materials decomposes to heat is around 350 ℃, and even such silicone oil becomes a nanoscale 3D structure, the thermal decomposition temperature improves to around 400 ℃, so sufficient thermal stability beyond the temperature required for cooking This can be secured.

The present invention can provide a structure in which the adhesion between the ceramic coating and the substrate is improved by chemically bonding the ceramic nanobeads and the hydrophobic silicone polymer among the components of the kitchen utensil ceramic coating liquid to control the degree of crosslinking of the silicone polymer.

Figure 1 (a) shows a vinylated silica manufacturing process synthesized by the Sol-gel method, Figure 1 (b) shows a chemical bonding reaction between vinylated silica and a silicone polymer (Poly (dimethoxysilane, PDMS)).
FIG. 2 is an FE-SEM image of (a) silica synthesized with TEOS and (b) v-silica synthesized with VTES.
FIG. 3 (a) is the FT-IR spectrum of synthetic silica (black) and v-silica (red), and FIG. 3 (b) is FT before and after curing (black) of v-silica / PDMS composite. -IR spectrum.
Figure 4 (a) is a typical load vs distance curve of the T-peel test, Figure 4 (b) is a graph showing the adhesion according to the type of silica, v-silica content, hydrosilane group ratio.
FIG. 5 (a) is a strain-stress curve of P1, S1, and V1 samples, and FIG. 5 (b) is a DSC graph of P1, S1, and V1 samples.
6 is a SEM image showing the surface shape (Morphology) of P1, S1, V1.

Hereinafter, the present invention will be described in more detail through examples. However, these examples are for illustrative purposes only, and the scope of the present invention is not limited to these examples.

Manufacturing example  1: Synthesis of silica nanoparticles with vinyl group introduced

5 mL of Vinyltriethoyxsilane (VTES) was added to 250 mL of water and 15 mL of ethanol, and stirred at room temperature for 1 hour, followed by addition of 3 mL of ammonium hydroxide, a catalyst, and further stirring for 1 hour and 30 minutes. After the reaction, the silica nanoparticles synthesized by the Sol-gel method are precipitated by treatment with a centrifuge (5000 rpm, 2236HR, Gyrozen) for 30 minutes for washing with water, and after adding ethanol, ultrasound is performed for 5 minutes (Digital sonifier 450, Branson). The treatment was performed 5 times to remove unreacted substances and aqueous ammonia.

Manufacturing example  2: Synthesis of silica nanoparticles

Silica nanoparticles were synthesized by a Sol-gel method by adding 1.7 mL of Tetraethyl orthosilicate (TEOS) to a mixed solution of 50 mL of methanol, 7.7 mL of water, and 11.25 mL of ammonia water and stirring at room temperature for 2 hours. After the reaction was completed, water was washed in the same manner as in Preparation Example 1 to prepare silica nanoparticles to be used as a control for removing unreacted substances and catalysts (ammonia water).

Example  One: PDMS and  Dispersing silica nanoparticles with vinyl groups

After mixing two types of PDMS (Dow Corning sylgard 184 part A and Terramix 157X) and PDMS (sylgard 184 part B) containing H drosilane until they become transparent with a magnetic stirrer, the vinyl group prepared in Preparation Example 1 is introduced. Silica nanoparticles were added and added 5 to 15 wt% to disperse the homogenizer (T-25 digital ULTRA-TURRAX, IKA) at a speed of 17000 rpm for 2 hours. After adding and stirring 2-10 ppm of Karstedt's catalyst in the dispersion solution, air bubbles were removed by vacuum and crosslinked by heat treatment in an 80 ^° C oven for 1-5 hours.

Experimental example  One

As shown in FIG. 2, it was confirmed that the vinylated silica nanoparticles (v-silica) of Preparation Example 1 were manufactured with an average diameter of 100 nm, and general silica (Production Example 2) was manufactured with an average diameter of 120 nm through FE-SEM.

The presence or absence of a vinyl group in v-silica was compared with general silica nanoparticles by FT-IR analysis (FIG. 3 (a)). The peak seen at 1100 cm ^-1 is due to the Si-O-Si stretching band of the SiO ₂ structure and was observed for both v-silica and normal silica. In the case of v-silica, it was separated into 1045 cm ^{- 1} and 1132 cm ^-1 , which is due to the Si-C stretching vibration band, and 1604 cm ^{- 1} is a peak by C = C stretching. You can. Additionally, the 3432 cm ^-1 peak is due to the -OH stretching band, and it can be confirmed that v-silica is very small compared to normal silica. It can be interpreted that the hydroxyl group on the normal silica surface was replaced with a vinyl group in v-silica.

Figure 3 (b) is a FT-IR spectrum before and after the hydrosilylation reaction of v-silica / PDMS according to Example 1. Looking at the Si-H stretching band (2162cm ^{- 1} ) and C = C stretching band (1604cm ^-1 ) before the hydrosilylation reaction, it can be seen that the phenomenon decreases after the reaction. This indicates that the Si-H group in PDMS and the C = C group in v-silica were successfully combined, and at the same time, there was also an unreacted reactor.

Experimental example  2: v-silica / PDMS nanocomposite  Lower adhesion test

T-peel test was performed using a universal testing equipment to find the lower adhesion of v-silica / PDMS nanocomposite. As a sample for the test, a total of 8 samples were prepared as shown in Table 1.

Sample
code PDMS (wt%) Fillers (wt%) Part A: Part B Silica v-silica P1 100 2: 1 - - S1 90 2: 1 10 - V1 90 2: 1 - 10 V2 95 2: 1 - 5 V3 85 2: 1 - 15 V4 90 10: 1 - 10 V5 90 1: 1 - 10 V6 90 1: 2 - 10

The lower adhesion test of the v-silica / PDMS nanocomposite confirmed the behavior according to the presence or absence of vinyl group, vinyl group content, and hydrosilane group content (FIG. 4).

In the case of the behavior of changing the adhesion strength to the silica type, when the normal silica beads (Production Example 2) were added, the adhesion strength of PDMS increased slightly, whereas when silica added with the Vinyl group (Production Example 1) was added, the adhesion strength increased by 426%. Got.

The behavior of change in adhesion strength with increasing amount of vinyl group is similar to that of pure PDMS at about 5wt%, but at over 10wt%, it was confirmed that the adhesion strength was improved by over 300%.

It can be seen that the tendency of the adhesive strength according to the content of the hydrosilane group is the same as the behavior of the vinyl group content change. As a result of the above experiment, it is determined that the hydrosilane group and the vinyl group have a direct influence on the lower adhesive strength.

As shown in the schematic diagram of FIG. 1, the reaction of the hydrosilane group and the vinyl group is estimated to change the phase structure of the PDMS matrix. To confirm this, strain-stress curve analysis and surface morphology using SEM and surface morphology using SEM were analyzed to confirm this ( 5 and 6).

In general, pure silica nanobeads evenly dispersed in a polymer matrix are known to increase the tensile stress and modulus of a composite material by increasing the viscosity and toughness of the polymer matrix. Stress and strain were significantly lower than that of P1, a pure PDMS. This phenomenon indicates that the added pure silica nanobeads reduced and stiffened the viscosity of the PDMS molecular chain.

On the other hand, in the case of V1, both tensile stress and modulus were significantly reduced compared to P1, but strain increased by more than 100%. Since tensile strength and strain are closely related to polymer network chain density, these results indicate that v-silica increases the surface adhesion by lowering the network chain density by interfering with the crosslinking reaction between PDMS in the PDMS network.

This is in good agreement with the DSC analysis results of Figure 5 (b). As the crosslink density of the PDMS network chain of the V1 sample was significantly lowered, peaks representing crystallization temperature (Tc) and melting temperature (Tm) that did not appear in P1 appeared.

This phenomenon was also clearly observed in the surface phenomenon of each sample. 6 is a surface shape of P1, S1, and V1. While the surface of P1 is smooth, the surface of S1 (FIG. 6 (b)) is pure silica nanobeads that are not well dispersed and are clustered and wrinkles are concentrated around them. The surface of V1 (FIG. 6 (c)) has a low wrinkled shape due to the low network chain density of the PDMS, and such a corrugated surface has a relatively large specific surface area and is soft, so that the surface adhesion is high.

Claims (15)

It contains ceramic nanoparticles with vinyl groups (-CH ₂ = CH ₂ ) and silicone polymers with hydrosilane groups (-SiH), but vinyl groups (-CH ₂ = CH ₂ ) and hydrosilane groups (-SiH) A nanocomposite characterized by chemically bonding ceramic nanoparticles and silicon polymers through hydrogensilylation of the liver. The method of claim 1, wherein the silicon nanopolymer having a vinyl group (-CH ₂ = CH ₂ ) and a silicone polymer having a hydrosilane group (-SiH) is formed through hydrosilylation and crosslinking between the silicone polymers. Nanocomposite characterized by this. According to claim 1, Nanocomposite characterized in that it is cured with silicone rubber through cross-linking between silicone oils having fluid hydrosilane groups (-SiH). The method according to claim 1, wherein the ceramic nanoparticles are dispersed in a silicone polymer matrix, and the ceramic nanoparticles having a vinyl group (-CH ₂ = CH ₂ ) are chemically bonded to a polymer chain in a network of silicone polymers to form a gap between the silicone polymers. Nanocomposite characterized by increasing the surface adhesion by lowering the network chain density by interfering with the crosslinking reaction. According to claim 1, Nanocomposite characterized in that to improve the adhesion to the substrate through a vinyl group of ceramic nanoparticles not participating in the hydrogenation reaction. The nanocomposite of claim 1, wherein the silicone polymer is polydimethylsiloxane (PDMS). A ceramic coating solution comprising the nanocomposite of any one of claims 1 to 6. Ceramic nanoparticles having a vinyl group (-CH ₂ = CH ₂ ); a silicone polymer having a hydrosilane group (-SiH); And a catalyst for hydrosilylation between a vinyl group (-CH ₂ = CH ₂ ) and a hydrosilane group (-SiH), wherein the ceramic coating for manufacturing a nanocomposite of any one of claims 1 to 6 is characterized by having a catalyst. Kit. A method for manufacturing an article coated with a part or all of the surface of the nanocomposite of claim 1,
Ceramic nanoparticles having a vinyl group (-CH ₂ = CH ₂ ); a silicone polymer having a hydrosilane group (-SiH); And applying a coating solution having a catalyst for hydrosilylation between a vinyl group (-CH ₂ = CH ₂ ) and a hydrosilane group (-SiH);
By heat treatment, (i) performing hydrosilylation between the ceramic nanoparticles having a vinyl group (-CH ₂ = CH ₂ ) and a silicone polymer having (-SiH) and (ii) crosslinking between the silicone polymers Method of manufacturing a coated article characterized in that it comprises a step. An article partially or entirely coated with the nanocomposite of claim 1. The article of claim 10, characterized in that it provides a corrugated coating surface through the nanocomposite. The article according to claim 10, wherein the nanocomposite is attached to the substrate through a vinyl group of ceramic nanoparticles that does not participate in the hydrogen silation reaction. The article according to claim 10, wherein the nanocomposite is a part coated with a part or all of the surface. The article according to claim 10, characterized in that the article is a kitchen appliance. The article of claim 10, wherein the nanocomposite is not exfoliated and / or does not undergo thermal decomposition even at temperatures above 350 ° C.

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